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オリジナル投稿者: Chris Green ,

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The thick black substance is epoxy that Micosoft applies to the boards to prevent reverse-engineering, and drive re-flashing.  It probably isn't causing your problem.  If your drive isn't being supplied power, then you may have a damaged console motherboard.  Check around the motherboard for damage or broken traces.  Also make sure that the DVD power connector is firmly attached and not damaged.  If you have a multimeter, you can check the voltages of the connector using [http://imageshack.us/photo/my-images/42/dvddrivecableheadpinout.jpg/sr=1|this diagram].

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